So if i connect live to l1, neutral to neutral and earth to earth, on the original, inputs. would i need to disconnect the l2 and l3 ect. or leave as is.
And if instead of the 3 phase output to vacuum pump, if i connected a single phase pump, just to the l1 out on the lr2k0321, would this work.

lr2k0321 below the lc1ko9.